Ulrich, J. ., C. . Feldhaus, E. . Cooney, and D. . Nickolich. “Circuit Analysis Tools: Integrating Smartphone and Tablet Applications and Simulation Software into Circuit Analysis Instruction and Laboratories”. International Journal of Learning, Teaching and Educational Research, vol. 12, no. 1, June 2015, pp. 64-83, http://www.ijlter.net/index.php/ijlter/article/view/1066.